Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea0539bcb9fb229…

MALICIOUS

PDF

118.9 KB Created: 2021-06-29 04:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 13056643df56c68fa7dc88c12b23a44f SHA-1: 281babc691bd1ccfd3ff784289102f4a4cac5d07 SHA-256: 4ea0539bcb9fb229b9608093da36b4920e9857278fe1c39bfab9a4c05c373a52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aba1668e6a9---kerifagupagemubodulafesuk.pdf In PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607169b12d1c5---keteguxafekedatukut.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/73c872fbc23ecc88996f7336bb04bf24/zotamuraraguretaza.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075873ec820f---23005297414.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bae2bd34c1---tiwajuzonotemigolopojatir.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/e1iosbilkepo5o8hg0vfstu3i1/sofenufimenedekevovibun.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/6jfcaj99pa8cdg4sisilbagk90/68673122731.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/2037031029.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a404fc416f4---34319139306.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/mibire.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9b28af4e---95494339444.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/zilidakavufezum.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/21474361624.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a0a2c32e8b6ae52f0fb3535b5be27e7/56000905790.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/80560152264.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/8d98d7c42b76ddfdd1ee3b9b7a682906/12423443321.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/41945e92ada2c7ab72e6bc2cd0ecaa24/57291507246.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/wemifiwexevadebisi.pdfIn PDF document text
    • http://newo.ru/files/files/sexofodunopebelagi.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/95699638383.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947db0f2298---jajosojotapavemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gametes+meaning+in+tamilPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00016aa1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16AA1 17548 bytes
SHA-256: 240958bf96ed70dce9f29c4e2f47dfd1a6bbaccbc4e645a286d87412576b568a
font_00_sfnt_off0001538b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538B 10272 bytes
SHA-256: f4c8b026a8d28583b070eb91d76e52c9fe813bc9ea64820333dbe1a6b3c34b07
font_02_sfnt_off0001849d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1849D 19120 bytes
SHA-256: 825667ca8a02e154d49716800733892233274a6bb948d3ea71e7c62e6cb0fad8
font_03_sfnt_off0001b659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.